On the evening of August 3rd, Grateful Dead guitarist Bob Weir will pay homage to his late bandmate, Jerry Garcia, who would have turned 70 this week, with a free webcast of a one-time-only assemblage of musicians. The tribute, entitled "Move Me Brightly," will feature Phish's Mike Gordon, Vampire Weekend's Chris Tomson, Grateful Dead vocalist Donna Jean Godchaux, Furthur's Joe Russo and Jeff Chimenti, Ryan Adams and the Cardinals' Neal Casal, the Hold Steady's Craig Finn and Tad Kubler and the Yellowbirds' Sam Cohen and Josh Kaufman, as well as Jim Lauderdale, Cass McCombs, Jonathan Wilson and Harper Simon. Actor Luke Wilson will host. The show will be webcast live at TRIStudios.com beginning at 6:30 p.m. PT.

In 2010, Weir built the Tamalpais Research Institute – otherwise known as TRI Studios – in a San Rafael warehouse, as a sort of futuristic hybrid between a state-of-the-art recording studio and a fully-equipped webcast station. The studio's crown jewel is a custom-designed Meyer Sound Constellation System, which can transform the sound in the main studio at the touch of a finger on an iPad. It can make the studio emulate the exact acoustic properties of rooms ranging from a nightclub to a chapel to, say, Madison Square Garden.

"It was kind of built on the principle that it was going to be a fun place to be," explains Weir in this video preview for the event. "The ultimate playpen for a musician." But with the studio's capabilities for stunning HD webcasting, most events at TRI are filmed, directed, mixed and webcast live – including Friday night's "Move Me Brightly" concert.

"I don’t know if [Garcia] would consider it a waste of time and money," says Weir about TRI. "But I think he'd wig out in here. I built it in his fond memory."

Check out this video preview, directed by Grateful Dead drummer Bill Kreutzmann's son, Justin. In addition to Weir discussing his new "playpen," Carlos Santana warmly recalls the first time he met Garcia, who passed away on August 9th, 1995 at the age of 53.